This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X60H, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI125 Standard Cylinder SI125X60H
The AirTAC SI125 Standard Cylinder SI125X60H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 60mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X60H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke60 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X60H
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI125 Standard Cylinder SI125X60H
The AirTAC SI125X60H is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 60 mm stroke. Delivering 6136 N push force at 0.5 MPa, it features a G1/2 port and high-temperature Viton H seals rated for 0 to 150 C. The direct replacement is the SAI125X60H, which maintains the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
This SAI upgrade introduces an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because this specific SI SKU lacks a magnet (-S), it cannot accept position sensors. For load-holding, note that standard cylinders drift on air loss; use an external rod lock or the SAI-only SAIL lock variant.
Airtac SI125 Standard Cylinder SI125X60H Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X60H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X60H |
| Bore size | Ø125 mm |
| Stroke | 60 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI125X60H carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAI125X60H produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI125 Standard Cylinder SI125X60H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×60 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI125 Standard Cylinder SI125X60H Is Used
Heavy Stamping Press
Drives large platens in metal forming with 6136 N thrust at 0.5 MPa, utilizing the 60 mm stroke for rapid high-force impact cycles.
High-Tact Foundry Gate
Actuates heavy safety barriers near molten metal, relying on the Viton H seals to withstand continuous 150 C ambient heat.
Replacing the Airtac SI125 Standard Cylinder SI125X60H with the SAI125X60H
To replace the discontinued SI125X60H, order the SAI125X60H. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port thread (PT, G, or NPT), and the 60 mm stroke. This SKU has no magnet and cannot take a sensor; if sensing is required, order an SAI125X60HS and use current AirTAC switches. Sizing both ways: the neighboring 100 mm bore provides 3927 N push at 0.5 MPa, while this 125 mm bore offers 6136 N. For load holding on air loss, the cushion only decelerates; add a pilot check valve or consider the SAIL or BSAI lock variants. The 32 mm rod and M27x2 thread are unchanged.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X60H
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI125 Standard Cylinder SI125X60H FAQ
Yes, the SI125X60H is discontinued. The direct replacement is the SAI125X60H. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 125 mm bore, 60 mm stroke, 6136 N output force, and G1/2 port.
It features a G1/2 air port. The force ratings are: 6136 N push and 5734 N pull at 0.5 MPa; 8590 N push at 0.7 MPa; 11045 N push at 0.9 MPa; and a theoretical maximum of 1251 kgf at 1.0 MPa. The operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X60H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X60H replacement — usually within 7-8 hours.